Uninitialized constant CSV::Reader

Hi,

I’ve searched google and these forums but can’t find anything for this
error i get.

code in a file called test.rb

require ‘csv’

CSV::Reader.parse(File.open(‘stuff.csv’, ‘rb’)) do |row|
p row
break if !row[0].is_null && row[0].data == ‘stop’
end

ruby test.rb # gives an error

NameError: uninitialized constant CSV::Reader
from (irb):8
from /usr/local/bin/irb:12:in `’

i get the same error when trying this in irb

any ideas??
Riga

Nathan S. wrote:

require ‘csv’

CSV::Reader.parse(File.open(‘stuff.csv’, ‘rb’)) do |row|

NameError: uninitialized constant CSV::Reader

any ideas??

Perhaps you have another file called csv.rb which is earlier in your
$LOAD_PATH

(If your own program is called csv.rb, that would the the culprit :slight_smile:

In any case, you’d probably be better off with the fastercsv gem.

Brian C. wrote:

Nathan S. wrote:

require ‘csv’

CSV::Reader.parse(File.open(‘stuff.csv’, ‘rb’)) do |row|

NameError: uninitialized constant CSV::Reader

any ideas??

Perhaps you have another file called csv.rb which is earlier in your
$LOAD_PATH

(If your own program is called csv.rb, that would the the culprit :slight_smile:

In any case, you’d probably be better off with the fastercsv gem.

Hi, thanks for response, Fastercsv actually quits with the following
notice which made me try CSV::Reader in the first place :slight_smile:

“Please switch to Ruby 1.9’s standard CSV library. It’s FasterCSV plus
support for Ruby 1.9’s m17n encoding engine.”

I havn’t created any csv.rb file and I’ll check loadpath but I would be
happy to use FasterCSV if anyone can suggest how i do this given the
above notice.

cheers

On Mar 31, 2010, at 9:29 AM, Nathan S. wrote:

“Please switch to Ruby 1.9’s standard CSV library. It’s FasterCSV plus
support for Ruby 1.9’s m17n encoding engine.”

I havn’t created any csv.rb file and I’ll check loadpath but I would be
happy to use FasterCSV if anyone can suggest how i do this given the
above notice.

You don’t want to be using it. That’s why I put the error there. :slight_smile:

The CSV library in Ruby 1.9 is literally the FasterCSV code. The reason
it’s preferable though is that it has been enhanced to handle Ruby
1.9-isms, like m17n. That’s why you need to switch over.

CSV::Reader is something from Ruby 1.8’s version of CSV (before it was
replaced by the FasterCSV code). You can’t use that anymore with 1.9.
Instead, you should mostly just be able to replace FasterCSV (or FSCV)
with CSV in your code and it will work fine.

Does that make sense?

James Edward G. II

On Mar 31, 2010, at 12:01 PM, Robert K. wrote:

Obviously he is using CSV already - just with a part of the old interface that has not survived. :slight_smile: He rather needs to adjust to the interface

CSV.foreach ‘stuff.csv’ do |row|

end

Exactly. I assumed since he mentioned using FasterCSV, he had code like
this somewhere he could just strip the Faster (or F) off of.

James Edward G. II

2010/3/31 James Edward G. II [email protected]

NameError: uninitialized constant CSV::Reader
Hi, thanks for response, Fastercsv actually quits with the following

The CSV library in Ruby 1.9 is literally the FasterCSV code. The reason it’s preferable though is that it has been enhanced to handle Ruby 1.9-isms, like m17n. That’s why you need to switch over.

CSV::Reader is something from Ruby 1.8’s version of CSV (before it was replaced by the FasterCSV code). You can’t use that anymore with 1.9. Instead, you should mostly just be able to replace FasterCSV (or FSCV) with CSV in your code and it will work fine.

Does that make sense?

I’d say yes - apart from the replacement suggestion. Obviously he is
using CSV already - just with a part of the old interface that has not
survived. :slight_smile: He rather needs to adjust to the interface

CSV.foreach ‘stuff.csv’ do |row|

end

Kind regards

robert

James Edward G. II wrote:

On Mar 31, 2010, at 12:01 PM, Robert K. wrote:

Obviously he is using CSV already - just with a part of the old interface that has not survived. :slight_smile: He rather needs to adjust to the interface

CSV.foreach ‘stuff.csv’ do |row|

end

Exactly. I assumed since he mentioned using FasterCSV, he had code like
this somewhere he could just strip the Faster (or F) off of.

James Edward G. II

hehe cheers guys that gives me a start :slight_smile: I’m just learning ruby and
hadn’t used either. I stumbled across FasterCSV which told me to use
CSV however i didn’t think to try the faster csv example with CSV
instead i googled for CSV examples and obviously stumbled across some
for older versions :slight_smile:

Thanks again for such speedy responses, off to get productive with some
csv file importing :slight_smile:

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